substrait-explain 0.7.0

//! Basic usage example for substrait-explain
//!
//! This example shows how to parse a Substrait plan and format it with different output options.

use substrait_explain::{OutputOptions, Parser, format, format_with_options};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    println!("=== Substrait-Explain Basic Usage ===\n");

    // Parse a plan with extensions
    let plan_text = r#"
=== Extensions
URNs:
  @  1: https://github.com/substrait-io/substrait/blob/main/extensions/functions_arithmetic.yaml
Functions:
  # 10 @  1: gt
  # 11 @  1: multiply
=== Plan
Root[revenue]
  Filter[gt($2, 100):boolean => $0, $1]
    Project[$0, $1, multiply($0, $1):fp64?]
      Read[orders => quantity:i32?, price:fp64?]
"#;

    let plan = Parser::parse(plan_text)?;
    // Output with standard options
    let (text, errors) = format(&plan);
    println!("== Standard output ==");
    println!("{text}");

    if !errors.is_empty() {
        println!("Warnings during conversion:");
        for error in errors {
            println!("  - {error}");
        }
        return Err(("Unexpected warnings during conversion!!!").into());
    }

    // Output with verbose options
    let (verbose_text, verbose_errors) = format_with_options(&plan, &OutputOptions::verbose());
    println!("\n== Verbose output ==");
    println!("{verbose_text}");

    if !verbose_errors.is_empty() {
        println!("Warnings during verbose conversion:");
        for error in verbose_errors {
            println!("  - {error}");
        }
        return Err(("Unexpected warnings during verbose conversion!!!").into());
    }

    Ok(())
}